Ok I am going to "try" and help here....
Pic #1-I am leaning towards pullet, watch for the wattles to come out more...
Pic #2-Is not a BR unless it is a hatchery bird. The barring isnt right for a breeders so i would say a sex-link of some kind. Gender wise, I think it is a cockerel. If the picture is correctly lit, I am seeing some wattles coming out.
Pic #3-He is a He. so far it is the best example of what wattles should look like at 5 weeks. could be a BO
Pic #4-again, chick in the back is a cockerel. Cant tell if it is the same bird as pic #3.
Pic #5-Black chick in the back could be a cockerel. His wattles are more pronounced then the other that I can see so i would guess...cockerel in the back. The other one i cant see any wattles but it could be the way the picture is taken. I also see a white dot on that ones head indicating a possible BR. If it the same bird as pic #9 you have a pullet!!!
I am not an expert at sexing but these are my opinions. They are all cute and enjoy them!